diff --git a/src/authentic2_wallonie_connect/roles.py b/src/authentic2_wallonie_connect/roles.py
index 32666d5..04bef48 100644
--- a/src/authentic2_wallonie_connect/roles.py
+++ b/src/authentic2_wallonie_connect/roles.py
@@ -113,5 +113,5 @@ def set_permissions(role, model_scope_ops):
                 target_id=ContentType.objects.get_for_model(model).pk)
             permissions.add(permission)
     if set(role.permissions.all()) != permissions:
-        role.permissions = permissions
+        role.permissions.set(permissions)